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' (No Model.) 4 Sheets-Sheet 1.

H. H. RUMBLB.

ADDING MAGHINE Patented Nov. 3,1891.

(No Model.) 4 Sheets-Sheet s.

H; H. RUMBLE.

' ADDING MAGHINE.

No. 462,384. Patented Nov. 3, 1891.

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(No Model.) 7 4 Sheets-Sheet 4. H. H. RUMBLE. AD'DING MACHINE N0.462,384. Patented Nov. 3, 1891.

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lJNrrno STATES PATENT @rrrcn.

HARRY IIUMFREY RUMBLE, ()F \VESTGATE-ON-SEA, ENGLAND.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 462,384, dated November3, 1891.

Application filed September 26, 1890. Serial No. 366,238. (No model.)Patented in England $epten1ber 15, 1890, No. 14,527.

T0 at whom it may concern:

Be it known that I, HARRY HUMFREY RUM- BLE, architect, a subject of HerMajesty the Queen of Great Britain and Ireland, residing at 10 AdrianSquare, \Vestgate-on-Sea, in the county of Kent, England, have inventednew and useful Improvements in Adding-Machines, (the same having beenpatented in Great Britain under date of September 15, 1890, No. 14,527,)of which the following is a specification.

This invention relates to improvements in machinery or apparatus for.adding figures. Its chief object is to produce at a moderate cost asimple and compact machine with as few parts as possible, which will beeasy to manipulate and certain in action.

The apparatus I employ consists, essentially, of a series ofindicating-disks representing different orders of numerals and bearingnumerals consecutively arranged and equally spaced around theirperipheries. Theseindicating-disks are connected with one another by apeculiar arrangement of carrying mechanism, and when caused to to tateindicate in progression through sight apertures in a casing whichincloses them the sum of the numbers added. The rotation of any of theindicating-disks is effected by the depression of any one of a series ofop crating-keys carried by a movable key-bar, each key of the seriescorresponding with a different numeral and being provided with aplunger, which when the key is depressed operates one of a set ofrocking levers connected with the in dicating-disks by mechanism hereinafter described. A separate rocking lever is required for eachindicating-disk. I con struct these rocking levers in the form of framesof varying size and dispose them so as to move independently, fittingone within the other. Each rocking lever carries a striking-plate ofsufficient length to receive the impact of the plungers of the entireseries of keys carried by the movable key-bar, and the machine is soconstructed and arranged that any one of the set of rocking-lever framesmay be operated upon in turn by the series of keys.

' By way of example I shall describe and illustrate in the annexeddrawings a machine arranged for performing simple addition or compoundaddition upon the decimal system, although it will be obvious thatwithout departing in any way from the spirit of my in= vention it mayreadily be adapted for the addition of pounds, shillings, and pence,tons, hundred-weights, and quarters, and the like.

In the accompanying drawings, in which similar letters refer tocorresponding parts in all the figures, Figure 1 is a sectional sideelevation of a machine embodying my invention. Fig. 2 is a side view ofone of the indicatingdisks and its actuating-rack. Fig. 3 illustrates infront view some of the indicatingdisks, together with theiractuating-racks.-

Fig. at is a view of some of the indicatingdisks in transverse section.Fig. 5 is a plan of the machine, showing clearly the arrangement of therocking-lever frames, the upper part of the case being removed. Fig. 6is a plan of the machine, the hood which covers the indicatingdisksbeing removed. Fig. 7 shows the machine in front elevation complete.Fig. 8 is a plan of the movable keybar. Fig. 9 is an end view of thesame.

I will commence by describing the arrangement of the adding-disks.

a a are the indicating-disks, arranged side by side and revolving freelyupon the spindle b, carried by the supports 0, secured to the casing (Z.Six of these adding-disks are shown in the drawings, the machine thereinillustrated being capable of indicating the sum of additions up tohundreds of thousands or (presuming the machine to be employed for thecompound addition of dollars and cents) up to thousands of dollars.

Commencing at the right-hand side, Fig. 6, the disks are arranged in thefollowing order: The first disk is for the addition of the lowest orderor units, and I shall hereinafter refer to the same as the units-disk.The second is for the addition of tens and hereinafter referred to asthetens-disk. The third is the hundreds-disk, the fourth thethousandsdisk, the fifth the tens-of-thousands disk, and the sixth thelnindreds-of-thousands disk. The series of adding-disks may of course beextended, if desired.

llach adding-disk has ten equal divisions or spaces around itsperiphery, occupied by the numerals 1 to 9, arranged consecutively, anda 0. e is a hood or cover secured to the casing d and inclosing theindicating-disks a. f f are sight-apertures in the hood 6, through whichthe figures constituting the sum of the numbers added are viewed.

I will now describe the means I employ for effecting the operation ofcarrying, so that when, for example, ten units have been added byrotating the units-disk, as hereinafter described, the correspondingamount in tensviz., lwill be indicated by the tens-disk.

Each indicating-disk, except the first or extreme right-hand disk, hassecured thereto, on its right hand side, a ratchet-wheel g, the teeth ofwhich correspond in number with the equal peripheral spaces or divisionsofv the disk to which it is secured. h are levers pivoted at h to thesupports 0, their free ends resting upon the stop-pins h". Each lever his provided with a pawl i, pivoted thereon at z", and having aprojection 'L', which bears upon the upper part of the lever 7L andkeeps the pawlt'elevated. 7t is aleverpivoted at 76' to the upper partof the support 0, the detent k of which lever engages with the teeth ofthe ratchet-wheel g and prevents the movement of the disk at in thewrong direction. Each indicating-disk carries upon its left-hand side aprojecting pin Z, which pin, as the disk to which it is secured revolvesand at the moment the zero thereof arrives at or passes the aperture f,strikes against the under side of the adjacent lever hand raises thesame, thereby causing the pawlt' of such lever to engage with the teethof the ratchetwheel g of the adjoining disk at ofnext higher order ordenominations and move the same forward, the pin Z then slipping fromoff the end of the'lever 7L, which falls back to its original position.The lever 71 and pin Zmust in each case be so proportioned and arrangedas that the pin Z will slip off the end of and release the lever himmediately the ratchetwheel 9 has been moved forward the distance ofone tooth, which is equivalent to moving forward the disk at, to whichthe ratchet-wheel is secured, a distance equal to one of its peripheraldivisions.

I will now describe the means I employ for effecting the movement of theadding-disks upon the depression of an operating-key.

Each indicating-disk a is constructed with a concentric recess a uponthe opposite side to its ratchet-wheel g, within which recess a fitsfreely a cl LltCl1-(llSkCL also mou nted loosely on the spindle b. Thisclutch-disk a carries a pinion-wheel m, engaged by a rack 'n.

a are notches formed around the periphery of the clutch-disk a eachnotch oontaininga ball a*. By referring to Fig. 2 it will be seen thatthese notches a? resemble in shape the teeth of a ratchet-wheel,deepening gradually from the periphery of the clutch-disk (t and thenterminatingin an abruptwall a. \Vhen the clutch-disk a is rotated in thedirection of the arrow, Fig. 2, by the elevation of the rack 11, ashereinafter explained, such of the balls a as are in contact with boththe disks CL and a will rotate the disk a. When, however, theclutch-disk a is rotated in the reverse dir'ection,'upon the return ofthe rack H to its normal position the balls a will be pushed back to thedeep portions of the notches a and the clutch-disk a be free to revolveindependently of the disk at. The lower end of each rack n is pivoted atn to an arm 0, se cured to a lever-framep, rocking on pivotsp, carriedby supports q, secured to the casing d. I construct these rocking-leverframes 1) of varying sizes and dispose them fitting within one anotherand working independently of each other, preferably atslightly-different levels, (see Figs. 1 and5,) thus effecting greateconomy of space and other advantages. Each rocking-lever frame ispivoted to separate su pports (1, a separate rocking-lever frame 19,connecting-arm 0, and rack n being required for each indicating-disk a.

p are striking-plates carried by the rocking-lever frames 19, againstwhich strikingplates the plungers r of the actuating-keys s strike whendepressed, thus raising the rack 02 of the lever-frame p operated upon,and consequently rotating the disk a engaged thereby, as beforeexplained.

it u are springs connected with the arms 0 of the rocking-lever frames pfor the purpose of restoring them to their original position withoutdelay when the key-pressure is released.

I will now describe the arrangement of the actuating-keys.Nineactu'ating-keys s are employed, numbered from 1 to 9 and carried bythe movable key-bar t, which is so constructed as to fit over any one ofa series of steps or projections cl, formed on the casing d, each stepor projection d being situated immediately above the striking-plate p ofa rockinglever frame 19 and provided with apertures d for the passage ofthe key-plungers 0". By-

shifting the key-bar t to various steps d the keys carried thereby maybe caused to operate in turn upon the striking-plates of all the rockinglever frames 19. The amount of depression permitted to every key 3 andthe position of the pivots or fulora p of the rocking-lever frames 19must be so arranged and adjusted that whatever rocking-lever frame p isbeing operated by the keys such rocking frame will, when akey isdepressed, advance the indicating-disk a with which it corresponds, bymeans of its arm 0 and rack 72, as many peripheral divisions as thenumber marked upon the key depressed. Thus, for example, when the keymarked 7 is depressed the rocking-lever framcp acted upon must ele vateits rack 01 sufficiently to advance the disk a with which it isconnected seven peripheral spaces or divisions; or, in other words,supposing the 0 (or zero) on such disk a to be opposite thesight-aperture f, on depressing the key marked? the disk a will berotated until the figure 7 thereon appears opposite the sight-aperturef. When the key marked 1 is depressed, the rocking-lever frame acted ICCupon must advance its corresponding disk at one peripheral division, andso on, the keys which bear the highest numerals being permitted thegreatest amount of depression.

22, Fig. 8, are pointers or indexes upon the key-bar t, which show theoperator (according to which denomination engraved upon the casing (1,Fig. 6; they point) upon which of the indicating-disks he is acting.Then, for instance, the keys .9 of the key-bar t are disposed so as tooperate upon the striking-plate of the rocking-lever frame connectedwith the units-disk the indexes or pointers n will point to the wordunits upon the casing d, and so on. w are handles for moving the key-bart. In order to maintain the key-bar tin position upon Whichever of thesteps d it is placed, rubber bands may be slipped over the pins 00 uponthe casing d and around the pins y on the key-bar. z are springs forraising the keys .9 after they have been depressed.

The action of the apparatus is as follows: \Vhen any key 5 is depressed,its plunger 0' comes into contact with and forces down thestriking-plate p of the rocking-lever frame p above which it isdisposed. The opposite end of the rocking-lever frame 19 is consequentlyraised, and by its connecting-arm o elevates the rack 92, pivotedthereto, and advances by the pinion-wheel m and clutch arrangementhereinbefore described its corresponding indicating-disk a as manyperipheral divisions as the number marked upon the key depressed.IVhenever the zero upon an indicating-disk or operated upon reaches orpasses the sight-aperture fin the hood 6, the adjacent indicating-diskof next higher order or denomination to the left is advanced oneperipheral division by the carrying mechanism, as before explained.Suppose it is desired to add 267 to 849. The adding-disks a are firstadjusted so that nothing but zeros are visible through the sightapertures f. The key-bar t is now placed upon the uppermost step d .ofthe case d, when its indexes n will point to the word units on theeasing, and the plungers r of its keys 5 will be situate over thestriking-plate of that rocking-lever frame 19 which corresponds with theunits-disk. The key marked .1 is depressed, which advances theunitsdisk, as before explained, nine peripheral divisions, and 9 appearsthrough the sight-aperture f. The key marked 7 is then struck,theuuits-disk moves seven more peripheral divisions, and consequentlythe thereon shows through the aperture f, while as the O passes suchaper ture the pin Z upon the units-disk moves the tens-disk oneperipheral division, and the total shown is "16. The key-bar t is nowpulled down to the next step (1 below, its indexes pointing to the wordtens on the casing. The 4: key is struck, the tens-disk-moves fourperipheral divisions, and 56 appears. The (3 key is then depressed andthe tens-disk moves six more peripheral divisions, causing the l thereonto arrive at the sight aperture f,

while as the 0 passes such aperture the pin Z on the tens-disk advancesthe hundreds-disk one peripheral division. The total then reads 116. Thekey-bartis then moved to the step d, situated over the striking-plate ofthe rocking-lever frame connected with the h undreds- (lisk, its indexespointing to hundreds. The 8 key is depressed, the hundreds-disk advancedeight peripheral divisions, and 916 appears. The 2 key is then struckand the total 1116 will show through the sight-apertn res f.

I prefer to arrange the series of keys carried by the key-bar 25 in theorder shown in Fig. 8, both hands being employed to operate the same.This arrangement leaves the keys requiring the greatest amount ofdepression to the stronger or right hand, while in each handthe weakeror third and fourth fingers have the least work to do. The elevation ofthe center keys will effectually guide the 0perators hands into positionand remove all risk of mistakes.

In conclusion I would observe that I am aware that a series of rotatingindicatingdisks connected with one another by carrying mechanism andoperated through connections by keys have before been proposed inadding-machines, and therefore I do not claim the same, broadly, as myinvention.

IVhat I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. In an adding-machine, the combination, with a series of adding-disks,of carrying mechanism connecting the same, a set of rocking-lever frames(one for each addingdisk) constructed and arranged as described, meansfor causing the adding-disks to rotate upon motion being imparted to therockinglever frames, a movable key-bar, and a series of numbered keyscarried thereby and adapted to operate upon more than one of therocking-lever frames, substantially as described and illustrated.

2. In an adding-machine, the combination, with a series of adding-disks,of carrying mechanism connecting the same, a set of rocking-leverframes, (one for each addingdisk,) rack and pinion, and friction-clutchconnections, as described, between each rocking-lever frame and eachadding-disk, and a series of numbered keys operating upon the rockinglever frames, substantially as described and illustrated.

3. In an adding-machine, the combination, with a series of adding-disks,of carrying mechanism connecting the same, a set of rocking-lever framesdisposed and working independently one within the other,connected withthe adding-disks,striking-plates carried by the rocking-leverframes, anda set of keys operating upon the said striking-plates, substantially asdescribed andillustrated.

4. In an adding-machine, the combination of a set of rocking leverframes, strikingplates carried thereby, a series of addingdisks, acasing formed with a series of steps or projections, each step orprojection being situated over the striking-plate of a rockingleverframe, and a movable key-bar carrying a series of keys and adapted tofit onto any of the steps or projections in the casing, so that any ofthe rocking-lever frames may be operated by the said keys, substantiallyas specified.

5. In an adding-machine comprising a series of adding-disks, carryingmechanism conn ecting the same, and a set of operating-keys, therocking-lever frames 19, disposed and working independently one Withinthe other and carrying striking-plates P2 for the key-plungers,substantially as described and illustrated.

6. In an adding-machine, the combination

